The muppet countdown is the latest collaboration between Sesame Street and NASA, Previously, NASA astronauts have appeared on the show, even filming segments while in space, and characters on Sesame ...

In response to inquiries, NASA released a statement on Monday referring to its talks with the "Sesame Street" team: "In 1984, NASA created the Space Flight Participant Program to select teachers ...

NBC News reported in 2014 that NASA confirmed sending Sesame Street characters into space was a consideration, but never more than that. "In 1984, NASA created the Space Flight Participant Program ...

Related: Photos: Sesame Street's Elmo Visits NASA That teacher was New Hampshire's Christa McAuliffe, who died along with six other astronauts on Jan. 28, 1986, after the space shuttle Challenger ...